Attachment device



FIG. 1 is a top perspective view of an attachment device showing my new design.

FIG. 2 is a right side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a left side elevation view;

FIG. 6 is a right side elevation view;

FIG. 7 is a front side elevation view; and,

FIG. 8 is a rear side elevation view.

The broken line showing of a continued length of the item attached to the attachment device is shown for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for an attachment device, as shown and described. 